Gold Exploration in Western USA
Vancouver based Orsa Ventures Corp. (Orsa) is a junior exploration
company focused on the acquisition of quality gold-silver-copper assets
in the western United States.
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Ashby Property
Overview
The Ashby project is located in Mineral County, Nevada about 18 miles southeast of the town of Hawthorne. It is comprised of 16 original claims covering the historic Ashby Mine as well 153 new lode claims staked by Orsa around the perimeter of the original claims. Orsa has the right to earn up to a 51% interest in the property through an option agreement with Bridgeport Ventures Inc. through phased exploration, cash payments and share issuances. Access to the property is excellent via an all-weather road.
The Ashby Property
The historic Ashby Mine is credited with reported production of 9,000 ounces of gold between 1934 and 1937. During the 1980's and 1990's, additional small scale mining removed several hundred ounces per year. Gold was produced from ten steeply dipping, inclined shafts from over several hundred metres of underground workings. Historic workings trace mineralization over a strike length of 650 metres on the north portion of the Ashby Property and in the south over 150 metres.
Mineralization occurs in a series of gold-bearing quartz veins carrying free gold, pyrite and minor silver. The workings have been mapped and sampled in some detail. Rock sampling near old workings has demonstrated the presence of gold mineralization (up to 24 gpt Au) as well as copper (up to 0.99% Cu) and lesser silver (up to 3.4 gpt Ag) mineralization.
While intrusive rocks have not been mapped at surface, a previous drill hole intercepted gold-bearing, altered, iron-oxide stained quartz monzonite 120 metres below the surface. Previous drilling also established the downward continuity of alteration associated with gold mineralization.
Approximately 900 metres east of the vein system, there are outcrops of strongly altered and bleached rock containing abundant barite and, locally, copper oxides and phosphates. To the southwest of the main gold zone there are numerous structurally controlled zones of quartz veining with associated gold values and copper mineralization. A recently completed Tensor IP survey completed on the original claims and surrounding area identified two significant anomalies which are consistent with the potential for porphyry style mineralization at depth and prompted staking of the additional claims.
In September 2011, Orsa initiated a district-scale mapping and sampling program. Although only a small portion of the claim block has been covered to date, structurally controlled zones of silicification and brecciation containing visible copper oxides have been found to the east, southeast and west of the workings. In the northwestern corner of the claim block a large zone of intense carbonate alteration containing blebs of pyrite and pyrrhotite has been found. This zone is crossed by at least two northerly-striking vein zones containing gossan from heavy sulfide content and quartz crystals up to 2 inches long. One sample from one of the quartz breccia zones contained 700 ppb Au, and others.
Based on its regional reconnaissance, results of the tensor IP survey and the intensity of alteration in the area, Orsa considers that the Lazy Man vein system might be part of a larger, intrusive-related hydrothermal system.
Mineralization occurs in a series of gold-bearing quartz veins carrying free gold, pyrite and minor silver. The workings have been mapped and sampled in some detail. Rock sampling near old workings has demonstrated the presence of gold mineralization (up to 24 gpt Au) as well as copper (up to 0.99% Cu) and lesser silver (up to 3.4 gpt Ag) mineralization.
While intrusive rocks have not been mapped at surface, a previous drill hole intercepted gold-bearing, altered, iron-oxide stained quartz monzonite 120 metres below the surface. Previous drilling also established the downward continuity of alteration associated with gold mineralization.
Approximately 900 metres east of the vein system, there are outcrops of strongly altered and bleached rock containing abundant barite and, locally, copper oxides and phosphates. To the southwest of the main gold zone there are numerous structurally controlled zones of quartz veining with associated gold values and copper mineralization. A recently completed Tensor IP survey completed on the original claims and surrounding area identified two significant anomalies which are consistent with the potential for porphyry style mineralization at depth and prompted staking of the additional claims.
In September 2011, Orsa initiated a district-scale mapping and sampling program. Although only a small portion of the claim block has been covered to date, structurally controlled zones of silicification and brecciation containing visible copper oxides have been found to the east, southeast and west of the workings. In the northwestern corner of the claim block a large zone of intense carbonate alteration containing blebs of pyrite and pyrrhotite has been found. This zone is crossed by at least two northerly-striking vein zones containing gossan from heavy sulfide content and quartz crystals up to 2 inches long. One sample from one of the quartz breccia zones contained 700 ppb Au, and others.
Based on its regional reconnaissance, results of the tensor IP survey and the intensity of alteration in the area, Orsa considers that the Lazy Man vein system might be part of a larger, intrusive-related hydrothermal system.
